Add skeleton of SDIO-based MMCSD driver
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2237 42af7a65-404d-4744-a932-0658087f49c3
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@ -34,5 +34,5 @@
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############################################################################
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############################################################################
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MMCSD_ASRCS =
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MMCSD_ASRCS =
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MMCSD_CSRCS = mmcsd_spi.c mmcsd_debug.c
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MMCSD_CSRCS = mmcsd.c mmcsd_spi.c mmcsd_debug.c
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457
drivers/mmcsd/mmcsd.c
Normal file
457
drivers/mmcsd/mmcsd.c
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@ -0,0 +1,457 @@
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/****************************************************************************
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* drivers/mmcsd/mmcsd.c
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*
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* Copyright (C) 2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/fs.h>
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#include <nuttx/rwbuffer.h>
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#include <nuttx/mmcsd.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define MAX_CREFS 0xff /* Because a ubyte is used. Use a larger
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* type if necessary */
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/* This structure is contains the unique state of the MMC/SD block driver */
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struct mmcsd_state_s
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{
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struct mmcsd_dev_s *dev; /* The MMCSD device bound to this instance */
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ubyte crefs; /* Open references on the driver */
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/* Status flags */
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ubyte widebus:1; /* TRUE: Wide 4-bit bus selected */
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ubyte mediachange:1; /* TRUE: Media changed since last check */
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#ifdef CONFIG_MMCSD_DMA
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ubyte dma:1; /* TRUE: hardware supports DMA */
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#endif
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/* Read-ahead and write buffering support */
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#if defined(CONFIG_FS_WRITEBUFFER) || defined(CONFIG_FS_READAHEAD)
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struct rwbuffer_s rwbuffer;
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#endif
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/* Transfer helpers *********************************************************/
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static ssize_t mmcsd_doread(FAR void *dev, FAR ubyte *buffer,
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off_t startblock, size_t nblocks);
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static ssize_t mmcsd_dowrite(FAR void *dev, FAR const ubyte *buffer,
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off_t startblock, size_t nblocks);
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/* Block driver methods *****************************************************/
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static int mmcsd_open(FAR struct inode *inode);
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static int mmcsd_close(FAR struct inode *inode);
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static ssize_t mmcsd_read(FAR struct inode *inode, unsigned char *buffer,
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size_t start_sector, unsigned int nsectors);
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#ifdef CONFIG_FS_WRITABLE
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static ssize_t mmcsd_write(FAR struct inode *inode, const unsigned char *buffer,
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size_t start_sector, unsigned int nsectors);
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#endif
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static int mmcsd_geometry(FAR struct inode *inode,
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struct geometry *geometry);
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static int mmcsd_ioctl(FAR struct inode *inode, int cmd,
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unsigned long arg);
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/* Initialization/uninitialization/reset ************************************/
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static int mmcsd_hwinitialize(struct mmcsd_state_s *priv);
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static inline void
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mmcsd_hwuninitialize(struct mmcsd_state_s *priv);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static const struct block_operations g_bops =
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{
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mmcsd_open, /* open */
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mmcsd_close, /* close */
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mmcsd_read, /* read */
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#ifdef CONFIG_FS_WRITABLE
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mmcsd_write, /* write */
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#else
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NULL, /* write */
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#endif
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mmcsd_geometry, /* geometry */
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mmcsd_ioctl /* ioctl */
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Transfer Helpers
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****************************************************************************/
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/****************************************************************************
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* Name: mmcsd_doread
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*
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* Description:
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* Read the specified numer of sectors from the physical device.
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*
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****************************************************************************/
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static ssize_t mmcsd_doread(FAR void *dev, FAR ubyte *buffer,
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off_t startblock, size_t nblocks)
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{
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struct mmcsd_state_s *priv = (struct mmcsd_state_s *)dev;
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# warning "Not implemented"
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return -ENOSYS;
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}
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/****************************************************************************
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* Name: mmcsd_dowrite
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*
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* Description: Write the specified number of sectors
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*
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****************************************************************************/
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#ifdef CONFIG_FS_WRITABLE
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static ssize_t mmcsd_dowrite(FAR void *dev, FAR const ubyte *buffer,
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off_t startblock, size_t nblocks)
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{
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struct mmcsd_state_s *priv = (struct mmcsd_state_s *)dev;
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# warning "Not implemented"
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return -ENOSYS;
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}
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#endif
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/****************************************************************************
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* Block Driver Methods
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****************************************************************************/
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/****************************************************************************
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* Name: mmcsd_open
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*
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* Description: Open the block device
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*
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****************************************************************************/
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static int mmcsd_open(FAR struct inode *inode)
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{
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struct mmcsd_state_s *priv;
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fvdbg("Entry\n");
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DEBUGASSERT(inode && inode->i_private);
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priv = (struct mmcsd_state_s *)inode->i_private;
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/* Just increment the reference count on the driver */
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DEBUGASSERT(priv->crefs < MAX_CREFS);
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priv->crefs++;
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return OK;
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}
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/****************************************************************************
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* Name: mmcsd_close
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*
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* Description: close the block device
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*
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****************************************************************************/
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static int mmcsd_close(FAR struct inode *inode)
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{
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struct mmcsd_state_s *priv;
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fvdbg("Entry\n");
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DEBUGASSERT(inode && inode->i_private);
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priv = (struct mmcsd_state_s *)inode->i_private;
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/* Decrement the reference count on the block driver */
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DEBUGASSERT(priv->crefs > 0);
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priv->crefs--;
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return OK;
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}
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/****************************************************************************
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* Name: mmcsd_read
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*
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* Description:
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* Read the specified numer of sectors from the read-ahead buffer or from
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* the physical device.
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*
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****************************************************************************/
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static ssize_t mmcsd_read(FAR struct inode *inode, unsigned char *buffer,
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size_t start_sector, unsigned int nsectors)
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{
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struct mmcsd_state_s *priv;
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fvdbg("sector: %d nsectors: %d sectorsize: %d\n");
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DEBUGASSERT(inode && inode->i_private);
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priv = (struct mmcsd_state_s *)inode->i_private;
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#ifdef CONFIG_FS_READAHEAD
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return rwb_read(&priv->rwbuffer, start_sector, nsectors, buffer);
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#else
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return mmcsd_doread(priv, buffer, start_sector, nsectors);
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#endif
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}
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/****************************************************************************
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* Name: mmcsd_write
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*
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* Description:
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* Write the specified number of sectors to the write buffer or to the
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* physical device.
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*
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****************************************************************************/
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#ifdef CONFIG_FS_WRITABLE
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static ssize_t mmcsd_write(FAR struct inode *inode, const unsigned char *buffer,
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size_t start_sector, unsigned int nsectors)
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{
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struct mmcsd_state_s *priv;
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fvdbg("sector: %d nsectors: %d sectorsize: %d\n");
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DEBUGASSERT(inode && inode->i_private);
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priv = (struct mmcsd_state_s *)inode->i_private;
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#ifdef CONFIG_FS_WRITEBUFFER
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return rwb_write(&priv->rwbuffer, start_sector, nsectors, buffer);
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#else
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return mmcsd_dowrite(priv, buffer, start_sector, nsectors);
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#endif
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}
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#endif
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/****************************************************************************
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* Name: mmcsd_geometry
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*
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* Description: Return device geometry
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*
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****************************************************************************/
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static int mmcsd_geometry(FAR struct inode *inode, struct geometry *geometry)
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{
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struct mmcsd_state_s *priv;
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fvdbg("Entry\n");
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DEBUGASSERT(inode && inode->i_private);
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if (geometry)
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{
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priv = (struct mmcsd_state_s *)inode->i_private;
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#warning "Not implemented"
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return -ENOSYS;
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}
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return -EINVAL;
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}
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/****************************************************************************
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* Name: mmcsd_ioctl
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*
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* Description: Return device geometry
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*
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****************************************************************************/
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static int mmcsd_ioctl(FAR struct inode *inode, int cmd, unsigned long arg)
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{
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struct mmcsd_state_s *priv ;
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fvdbg("Entry\n");
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DEBUGASSERT(inode && inode->i_private);
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priv = (struct mmcsd_state_s *)inode->i_private;
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#warning "Not implemented"
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return -ENOTTY;
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}
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/****************************************************************************
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* Initialization/uninitialization/reset
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****************************************************************************/
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/****************************************************************************
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* Name: mmcsd_hwinitialize
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*
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* Description: One-time hardware initialization
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*
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****************************************************************************/
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static int mmcsd_hwinitialize(struct mmcsd_state_s *priv)
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{
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#warning "Not implemented"
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return -ENODEV;
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}
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/****************************************************************************
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* Name: mmcsd_hwinitialize
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*
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* Description: Restore the MMC/SD slot to the uninitialized state
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*
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****************************************************************************/
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static inline void mmcsd_hwuninitialize(struct mmcsd_state_s *priv)
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{
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MMCSD_RESET(priv->dev);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: mmcsd_slotinitialize
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*
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* Description:
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* Initialize one slot for operation using the MMC/SD interface
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*
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* Input Parameters:
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* minor - The MMC/SD minor device number. The MMC/SD device will be
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* registered as /dev/mmcsdN where N is the minor number
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* slotno - The slot number to use. This is only meaningful for architectures
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* that support multiple MMC/SD slots. This value must be in the range
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* {0, ..., CONFIG_MMCSD_NSLOTS}.
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* dev - And instance of an MMC/SD interface. The MMC/SD hardware should
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* be initialized and ready to use.
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*
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****************************************************************************/
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int mmcsd_slotinitialize(int minor, int slotno, FAR struct mmcsd_dev_s *dev)
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{
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struct mmcsd_state_s *priv;
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char devname[16];
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int ret = -ENOMEM;
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fvdbg("minor: %d slotno: %d\n", minor, slotno);
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/* Sanity check */
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#ifdef CONFIG_DEBUG
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if (minor < 0 || minor > 255 || !dev)
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{
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return -EINVAL;
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}
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#endif
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/* Allocate a MMC/SD state structure */
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priv = (struct mmcsd_state_s *)malloc(sizeof(struct mmcsd_state_s));
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if (priv)
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{
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/* Initialize the MMC/SD state structure */
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memset(priv, 0, sizeof(struct mmcsd_state_s));
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/* Bind the MMCSD driver to the MMCSD state structure */
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priv->dev = dev;
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/* Initialize the hardware associated with the slot */
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ret = mmcsd_hwinitialize(priv);
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/* Was the slot initialized successfully? */
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if (ret != 0)
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{
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/* No... But the error ENODEV is returned if hardware initialization
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* succeeded but no card is inserted in the slot. In this case, the
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* no error occurred, but the driver is still not ready.
|
||||||
|
*/
|
||||||
|
|
||||||
|
if (ret == -ENODEV)
|
||||||
|
{
|
||||||
|
fdbg("MMC/SD slot %d is empty\n", slotno);
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
fdbg("ERROR: Failed to initialize MMC/SD slot %d: %d\n",
|
||||||
|
slotno, -ret);
|
||||||
|
goto errout_with_alloc;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Initialize buffering */
|
||||||
|
|
||||||
|
#if defined(CONFIG_FS_WRITEBUFFER) || defined(CONFIG_FS_READAHEAD)
|
||||||
|
|
||||||
|
ret = rwb_initialize(&priv->rwbuffer);
|
||||||
|
if (ret < 0)
|
||||||
|
{
|
||||||
|
fdbg("ERROR: Buffer setup failed: %d\n", -ret);
|
||||||
|
goto errout_with_hwinit;
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* Create a MMCSD device name */
|
||||||
|
|
||||||
|
snprintf(devname, 16, "/dev/mmcsd%d", minor);
|
||||||
|
|
||||||
|
/* Inode private data is a reference to the MMCSD state structure */
|
||||||
|
|
||||||
|
ret = register_blockdriver(devname, &g_bops, 0, priv);
|
||||||
|
if (ret < 0)
|
||||||
|
{
|
||||||
|
fdbg("ERROR: register_blockdriver failed: %d\n", -ret);
|
||||||
|
goto errout_with_buffers;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return OK;
|
||||||
|
|
||||||
|
errout_with_buffers:
|
||||||
|
#if defined(CONFIG_FS_WRITEBUFFER) || defined(CONFIG_FS_READAHEAD)
|
||||||
|
rwb_uninitialize(&priv->rwbuffer);
|
||||||
|
#endif
|
||||||
|
errout_with_hwinit:
|
||||||
|
mmcsd_hwuninitialize(priv);
|
||||||
|
errout_with_alloc:
|
||||||
|
free(priv);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
@ -1,7 +1,7 @@
|
|||||||
/****************************************************************************
|
/****************************************************************************
|
||||||
* include/nuttx/mmcsd.h
|
* include/nuttx/mmcsd.h
|
||||||
*
|
*
|
||||||
* Copyright (C) 2008 Gregory Nutt. All rights reserved.
|
* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
|
||||||
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
||||||
*
|
*
|
||||||
* Redistribution and use in source and binary forms, with or without
|
* Redistribution and use in source and binary forms, with or without
|
||||||
@ -64,7 +64,7 @@
|
|||||||
* Name: MMCSD_RESET
|
* Name: MMCSD_RESET
|
||||||
*
|
*
|
||||||
* Description:
|
* Description:
|
||||||
* Reset the MMC/SD controller
|
* Reset the MMC/SD controller. Undo all setup and initialization.
|
||||||
*
|
*
|
||||||
* Input Parameters:
|
* Input Parameters:
|
||||||
* dev - An instance of the MMC/SD device interface
|
* dev - An instance of the MMC/SD device interface
|
||||||
@ -558,7 +558,7 @@ extern "C" {
|
|||||||
*
|
*
|
||||||
****************************************************************************/
|
****************************************************************************/
|
||||||
|
|
||||||
EXTERN int mmcsd_slotinitialize(int minor, int slotno, FAR FAR struct mmcsd_dev_s *dev);
|
EXTERN int mmcsd_slotinitialize(int minor, int slotno, FAR struct mmcsd_dev_s *dev);
|
||||||
|
|
||||||
/****************************************************************************
|
/****************************************************************************
|
||||||
* Name: mmcsd_spislotinitialize
|
* Name: mmcsd_spislotinitialize
|
||||||
|
|||||||
@ -68,7 +68,7 @@
|
|||||||
typedef ssize_t (*rwbreload_t)(FAR void *dev, FAR ubyte *buffer,
|
typedef ssize_t (*rwbreload_t)(FAR void *dev, FAR ubyte *buffer,
|
||||||
off_t startblock, size_t nblocks);
|
off_t startblock, size_t nblocks);
|
||||||
typedef ssize_t (*rwbflush_t)(FAR void *dev, FAR const ubyte *buffer,
|
typedef ssize_t (*rwbflush_t)(FAR void *dev, FAR const ubyte *buffer,
|
||||||
off_t startblockr, size_t nblocks);
|
off_t startblock, size_t nblocks);
|
||||||
|
|
||||||
/* This structure holds the state of the buffers. In typical usage,
|
/* This structure holds the state of the buffers. In typical usage,
|
||||||
* an instance of this structure is declared within each block driver
|
* an instance of this structure is declared within each block driver
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user